Airmar Speed & Temperature Transducer Identification
IDENTIFICATION CHART
Tell an Airmar ST850, ST800, ST650 or ST600 thru-hull speed & temperature sensor apart, see which housing it lives in and what replaces the discontinued models.
DocumentAirmar Speed & Temperature Transducer Identification
FormatPDF · 1 page · 0.1 MB
LanguageEnglish
Which Sensor Do You Have?
| Model | Status | How to recognise it | Removable part | Housings |
|---|---|---|---|---|
| ST850 | Current | The only model with 2 threaded nuts on top and a pull ring | Valve sleeve, speed insert & ring | P17, B17, SS577 |
| ST800 | Current | Top looks similar to the DST800 | Insert only | P120, B120, SS521 |
| ST650 | Discontinued → replace with ST850 (fits the same housing) | The only model with a pin & 2 rings | Insert, valve sleeve & pin with rings | P17, B17, SS577 |
| ST600 | Discontinued → replace with ST800 (fits the same housing) | Single pull ring on top, pointing forward | Insert with ring | P120 or B120 |
2" Housings (P17, B17, SS577)
- No built-in valve: a separate valve sleeve slides into the housing.
- On the ST850 the valve sleeve can be removed if necessary.
- On ST650 installs the installer slides the valve sleeve in during installation (the chart prints this housing as "SS557" in the ST650 column).
Smaller Housings (P120, B120, SS521)
- P120, B120 and SS521 plastic housings used with the ST800 have a built-in valve that cannot be removed.
- In the ST600 column: the plastic P120 has a built-in, non-removable valve; the bronze B120 has no valve.
Photo Chart
Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.
Products in this Selection Guide
